Torch mixer



Dec. s, 1927'. 1,651,854

G. L. WALKER TORCH MIXER I Filed-July' 9, 1927 y all/1 vPatented- Dec. 6, 1927.

, UNITED STATE-s.

1,651,854 PATENT OFFICE.

GEORGE I. WALKER, 0F NEW YORK, N. 'Y., ASSIGNOR TO .AIR REDUCTION COMPANY, INCORPORATED, F NEW YORK,l N. Y., A CORPORATION 0F NEW YORK.

TORCH MIXER.

Application sled .Tuiy e, 1927. serial No. 204,453'.

In oxyacetylene or like torches having a head or socket connected with the gas conduits,4 and a tip or mixer wherein the gases are brought together, the oxygen may be, and

1 5' frequently is, admitted to the rear end of the socket, the acetylene or other combustible gas entering the` side of the socket.- In torches. which aredesigned to use oxygen supplied under a considerably higher presln sure than the acetylene, there is an advantage in reversing this arrangement, since the head can then be made of smaller diameter, owing to the fact that the oxygen requires a smaller. passage than the acetylene and can therefore be drilled in a thinner side wall.

The object of the invention is to provide an advantageous style of mixer or tip for such torches, and particularly to enable suchf torches to operate with injector or semi-1njector tips or mixers.

' In the accompanying drawings forming part hereof: Y

Fig. l is a longitudinal v torch embodying the invention, the stock or handle of the torch being broken away and intermediate portions of the tip yunit being broken out, the plug in the rear end of the mixer being in elevation; ff

section through a Fig. 2 is a longitudinal section on a larger l3o scale through the mixer;

Fig. 3 'is a cross-section on the line 3-3 of Fig. l; and f' Fig. 4 is a perspective view of the plug. The casing of the stock or vhandle of the torch is marked 2, and 3 is a head or block held inthe front end of this tubular casing. T he narrowness of this head is a desirable feature. 4 and 5 are the oxygen and acetylene (or combustible gas) conduits which extend 4o through the case, theirforward ends secured 1 in the rear portion of the head. These pipes will be understood to represent the anterior tubes, connections, gas supplies and provisions whereby in the operation of the 'appay ratus the gases ow in the manner indicated.

The acetylene or other combustible lgas is admitted ,through a short bore 6 tothe rear end of a conical socket? in theforward part of the head. A narrow bore 8 is drilled in the thickness of the side wall-of the head `from the socket of the oxygen pipe 4 to a recess 9 in the side of the socket 7 v` `TheY torch illustrated has an elongated orA extended bent tube tip structure 10,but the l invention is also applicable to shorter tips,

and to torch mixers generally. The tip structure shown comprises a rear. part 11, a nozzle 12 and an mtervemng bent extension tube 13. The part :11 has a longitudinal mixing passage 14, which is continued in the parts 13 and 12. The rear portion of the passage 14 in the member 1l is preferably reduced to form a throat 15.

Back of the throat 15, the member 11 .is formed withfan enlarged cylindrical chamber 16, extending forward from the rear end. of the member. This 4chamber receives a cylindrical plug 17 which is driven in tightly from the rear end, not, however, filling the forward end of the chamber. The forwardend of the plug is reduced to form a nozzle 18 whiclf L'terminates in line with and at a definite narrow distance from the rear end of the throat 15 of the passage 14. A shoulder or enlargement 19 on the rear end of the plug which abuts a shoulder in the member 11 when the plug is fully inserted determines the spacing of the nozzle from the passage.

A central jet passage 20 is drilled from the forward end ofthe plug, through Jthe nozzle 18 and part way into the body of the plug, this passage having no communication with the rear end. A lateral entry port 21 is drilled transversely through the side of the member 11 and the plug 17 to intersect in the socket by the bushing nut 24. The v i entry port 21 is drilled from the groove 23.

,The plug 17 is also formed with two longitudinal external grooves 25 symmetrically disposed at opposite sides, these grooves being of ample size and extending from the rear to the forward part of the. chamber 16.

It will, therefore, be understood that the oxygen is conducted in from the side through the entry port 21, and 1s delivered through the passage 20 and nozzle 18 in aspirating relation to the combustible gas admitted to the chamber 16 through the pas" sages 25.

The invention is notnecessarily limited,

however, to cases in which the oxygenpressure is higher than the pressure of the comy bustible gas and the oxygenis utilized toenliol train the combustible gas. A similar construction couldbe employed in torches designed to use oxygen at pressures 'only a little above that of the acetylene, or at an equal pressure therewith, or even lower, the arrangements in the mixer being appropriately modified for positive mixing rather than injector'mixing. In other words, the inven'- tion would be applicable to any case in which it might be desired to have the oxygen at the side in the head and the combustible gas at or nearer the center, and to reverse these relationsin the mixer.

Iclaim:

1. A torch mixer comprising a member formed to fit a socket in the torch, said member having a mixing passage and an enlarged chamber in communication with the rear end of said passage, and a plug inserted tightly in said chamber from the -rear end, there being a longitudinal passage formed between saidplug and the Wall of said chamber for conducting one kind of gas from the rear end of said member to the forward part of said chamber, said plug having an internal passage extending rear- Ward from the front end of the plug only part wayl through the plug, there being a lateral entry port to said internal passage.

formed to fit a socket in the torch. said member having a mixing passage and an enlarged chamber lin communication with said passage, a plug inserted tightly in said chamber from the rear end and leaving a space at the forward end of the chamber, said plug being provided with an external grooveforming a passage for one kind of gas leading from the rear end to said space, and being also provided with a central lon- 2. A torch mixer comprising a membery lgitudinal jet passage for the other kind of -larged chamber in communication .with said passage, a plug inserted tightly in said chamber from the rear end and leaving a space at the forward' end of the chamber, the forward end of said plug constituting a jet nozzle, said plug being provided with an external groove forming a passage for one kind of gas leading from the rear end to said space, and being also provided With a central ylongitudinal jet passage for. the other kind of gas, said jet passage-extend`l ing only part way of the length of said plug,

,and there being a lateral entry port torsaid jet passage. A y,

4. In a torch, the combination'with a head having asocket withr means for supplyingv oxygen to the side of said socket and a combustible gas to therear end thereof, of a tip member having a rear portion formed for sealing engagement with said socket, said member lhaving a mixing passage and an enlarged chamber in its rear portion in communication with said passage, and a plug inserted tightly in said chamber from the rear end, said plug having a jet nozzle at its forward end and being formed with an external groove leading from the rear end and with an internal jet passage, the latterextending only part way through the plug, and there being a lateral entry port to said jet passage. GEORGE L. 

